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Kirjavainen J. and Westman K., 1999. Natural history and development of the introduced signal crayfish, Pacifastacus leniusculus, in a small, isolated Finnish lake, from 1968 to 1993. Aquat. Living Resour., 12, 387–401.
[CrossRef][EDP Sciences]

Westman K., 1973. The population of the crayfish Astacus astacus L. in Finland and the introduction of the American crayfish Pacifastacus leniusculus Dana. Freshw. Crayfish, 1, 41–55.

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Westman K., Savolainen R. and Pursiainen M., 1999. Development of the introduced North American signal crayfish, Pacifastacus leniusculus (Dana), population in a small Finnish forest lake in 1970–1997. Boreal Env. Res., 4, 387–407.

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